Well-defined AbBA triblock bottlebrush with poly(N,N-dimethyl acrylamide) (PAm) as A block and polyacrylate, densely grafted with poly(tert-butyl acrylate)-block-polystyrene (PBA-b-PS), as brush bB block is prepared by controlled radical polymerization and click chemistry. The triblock copolymer with a composition of PAm200 -b-b(PBA14 -b-PS47 )167 -b-PAm200 is obtained and is further transformed into PAm200 -b-b(PAA14 -b-PS47 )167 -b-PAm200 by hydrolysis of the PBA segment into poly(acrylic acid) (PAA). In a mixture of N,N-dimethylformamide (DMF) and methanol, a poor solvent of bB block, PAm200 -b-b(PAA14 -b-PS47 )167 -b-PAm200 self-assembled into disk-like platelets, which have an internal lamellar structure by further microphase-separation of PAA-b-PS branches in 2D. Moreover, Ag nanoparticles are aligned by PAA segments along the disk to form a pattern.
Keywords: block copolymers; microphase separation; molecular bottlebrushes; self-assembly.
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